/* Tunable type information.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _TUNABLE_TYPES_H_

# define _TUNABLE_TYPES_H_

#include <stddef.h>

typedef enum

{

  TUNABLE_TYPE_INT_32,

  TUNABLE_TYPE_UINT_64,

  TUNABLE_TYPE_SIZE_T,

  TUNABLE_TYPE_STRING

} tunable_type_code_t;

typedef struct

{

  tunable_type_code_t type_code;

  int64_t min;

  int64_t max;

} tunable_type_t;

typedef union

{

  int64_t numval;

  const char *strval;

} tunable_val_t;

typedef void (*tunable_callback_t) (tunable_val_t *);

/* Security level for tunables.  This decides what to do with individual

   tunables for AT_SECURE binaries.  */

typedef enum

{

  /* Erase the tunable for AT_SECURE binaries so that child processes don't

     read it.  */

  TUNABLE_SECLEVEL_SXID_ERASE = 0,

  /* Ignore the tunable for AT_SECURE binaries, but don't erase it, so that

     child processes can read it.  */

  TUNABLE_SECLEVEL_SXID_IGNORE = 1,

  /* Read the tunable.  */

  TUNABLE_SECLEVEL_NONE = 2,

} tunable_seclevel_t;

#endif